" In Hinduism, Manu is a title accorded the progenitor of mankind, first king to rule this earth, who saves mankind from the universal flood. He is honest which is why he is called "Satyavrata", or oath of truth.

Mahabharata says: "And Manu was embued with great wisdom and devoted to virtue. And he became the progenitor of a line. And in Manu's race have been born all human beings, who have, therefore, been called Manavas. And it is of Manu that all men including Brahmanas, Kshatriyas, and others have been descended, and are, therefore, all called Manavas. Subsequently, O monarch, the Brahmanas became united with the Kshatriyas. And those sons of Manu that were Brahmanas devoted themselves to the study of the Vedas. "The ten sons of Manu are known as Vena, Dhrishnu, Narishyan, Nabhaga, Ikshvaku, Karusha, Saryati, the eighth, a daughter named Ila, Prishadhru the ninth, and Nabhagarishta, the tenth. They all betook themselves to the practices of Kshatriyas. Besides these, Manu had fifty other sons on Earth. But we heard that they all perished, quarrelling with one another." ( Wikipedia )

" Mu is the name of a hypothetical continent that allegedly existed in one of Earth's oceans, but disappeared at the dawn of human history.

The concept and the name were proposed by 19th century traveler and writer Augustus Le Plongeon, who claimed that several ancient civilizations, such as those of Egypt and Mesoamerica, were created by refugees from Mu — which he located in the Atlantic Ocean. This concept was popularized and expanded by James Churchward (1851–1936), who asserted that Mu was once located in the Pacific.

The existence of Mu was disputed already in Le Plongeon's time. Today, scientists dismiss the concept of Mu (and of other lost continents like Lemuria) as physically impossible, since a continent cannot sink nor be destroyed by any conceivable catastrophe, especially not in the short period of time required by this premise. Moreover, the weight of all archaeological, linguistic and genetic evidence is contrary to the claim that the ancient civilizations of the New and Old Worlds have a common origin. So, the very "facts" that the theory was conceived to explain are now seen to be false. Mu is today considered to be a fiction, and books on the subject are classified as 'New Age' or 'Religion and Spirituality' "( Wikipedia )